diff --git a/Sources/ArgumentParser/Parsable Types/ExpressibleByArgument.swift b/Sources/ArgumentParser/Parsable Types/ExpressibleByArgument.swift
index 0f09b90a..b0aeb07e 100644
--- a/Sources/ArgumentParser/Parsable Types/ExpressibleByArgument.swift	
+++ b/Sources/ArgumentParser/Parsable Types/ExpressibleByArgument.swift	
@@ -122,6 +122,17 @@ extension LosslessStringConvertible where Self: ExpressibleByArgument {
   }
 }
 
+extension LosslessStringConvertible
+where
+  Self: ExpressibleByArgument & RawRepresentable,
+  RawValue: ExpressibleByArgument
+{
+  // Ambiguity breaker
+  public init?(argument: String) {
+    self.init(argument)
+  }
+}
+
 extension Int: ExpressibleByArgument {}
 extension Int8: ExpressibleByArgument {}
 extension Int16: ExpressibleByArgument {}
diff --git a/Tests/ArgumentParserEndToEndTests/RawRepresentableEndToEndTests.swift b/Tests/ArgumentParserEndToEndTests/RawRepresentableEndToEndTests.swift
index a4f40b56..62114659 100644
--- a/Tests/ArgumentParserEndToEndTests/RawRepresentableEndToEndTests.swift
+++ b/Tests/ArgumentParserEndToEndTests/RawRepresentableEndToEndTests.swift
@@ -48,3 +48,16 @@ extension RawRepresentableEndToEndTests {
     XCTAssertThrowsError(try Bar.parse(["--identifier", "123.456"]))
   }
 }
+
+struct LogLevel: RawRepresentable, CustomStringConvertible {
+  var rawValue: String
+  var description: String { rawValue }
+}
+
+extension LogLevel: LosslessStringConvertible {
+  init(_ description: String) {
+    self.rawValue = description
+  }
+}
+
+extension LogLevel: ExpressibleByArgument {}